2163663 has 12 divisors (see below), whose sum is σ = 3290040. Its totient is φ = 1366416.

The previous prime is 2163653. The next prime is 2163671. The reversal of 2163663 is 3663612.

2163663 is a `hidden beast` number, since 21 + 636 + 6 + 3 = 666.

It is not a de Polignac number, because 2163663 - 2¹⁰ = 2162639 is a prime.

2163663 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6156 + ... + 6497.

It is an arithmetic number, because the mean of its divisors is an integer number (274170).

2^2163663 is an apocalyptic number.

2163663 is a deficient number, since it is larger than the sum of its proper divisors (1126377).

2163663 is a wasteful number, since it uses less digits than its factorization.

2163663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12678 (or 12675 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 2163663 is about 1470.9394956965. The cubic root of 2163663 is about 129.3391113785.

The spelling of 2163663 in words is "two million, one hundred sixty-three thousand, six hundred sixty-three".